https://scholars.lib.ntu.edu.tw/handle/123456789/626309
標題: | Multiple Emission of Phosphonium Fluorophores Harnessed by the Pathways of Photoinduced Counterion Migration | 作者: | Belyaev A Su B.-K Cheng Y.-H Liu Z.-Y Khan N.M Karttunen A.J PI-TAI CHOU Koshevoy I.O. |
關鍵字: | Charge Transfer; Donor–Acceptor Systems; Dual Emission; Ion Pairs; Phosphonium | 公開日期: | 2022 | 卷: | 61 | 期: | 19 | 來源出版物: | Angewandte Chemie - International Edition | 摘要: | In the emerging field of intramolecular charge transfer induced counterion migration, we report the new insights into photophysical features of luminescent donor–acceptor phosphonium dyes (D−π−)nA+[X−] (π=−(C6H4)x−). The unique connectivity of the phosphorus atom affords multipolar molecules with a variable number of arms and the electronic properties of the acceptor group. In the ion-paired form, the transition from dipolar to quadrupolar configuration enhances the low energy migration-induced band by providing the additional pathways for anion motion. The multipolar architecture, adjustable lengths of the π-spacers and the nature of counterions allow for efficient tuning of the emission and achieving nearly pure white light with quantum yields around 30 %. The methyl substituent at the phosphorus atom reduces the rate of ion migration and suppresses the red shifted bands, simultaneously improving total emission intensity. The results unveil the harnessing of the multiple emission of phosphonium fluorophores by anion migration via structure and branching of donor–acceptor arms. © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125187067&doi=10.1002%2fanie.202115690&partnerID=40&md5=3406b39fb1b8312eb2dcba729f76a101 https://scholars.lib.ntu.edu.tw/handle/123456789/626309 |
ISSN: | 14337851 | DOI: | 10.1002/anie.202115690 | SDG/關鍵字: | Electronic properties; Fluorophores; Ions; Phosphorus; Red Shift; Counterions; Donor-acceptor system; Donor/acceptor; Dual emissions; Intra-molecular charge transfer; Intramolecular charge transfers; Ion pairs; Phosphonia; Phosphorus atom; Photo-induced; Charge transfer |
顯示於: | 化學系 |
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